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the C runtime now supports reading and writing expressions with indexed meta variables. The type checker generates fresh indices

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kr.angelov
2014-10-17 09:27:37 +00:00
parent 6dc1df3011
commit 70bf9f78b1
2 changed files with 19 additions and 5 deletions
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16
src/runtime/c/pgf/expr.c
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@@ -344,10 +344,18 @@ pgf_expr_parser_term(PgfExprParser* parser)
}
case PGF_TOKEN_QUESTION: {
pgf_expr_parser_token(parser);
PgfMetaId id = 0;
if (parser->token_tag == PGF_TOKEN_INT) {
char* str =
gu_buf_data(parser->token_value);
id = atoi(str);
pgf_expr_parser_token(parser);
}
return gu_new_variant_i(parser->expr_pool,
PGF_EXPR_META,
PgfExprMeta,
0);
id);
}
case PGF_TOKEN_IDENT: {
PgfCId id = gu_buf_data(parser->token_value);
@@ -1052,9 +1060,13 @@ pgf_print_expr(PgfExpr expr, PgfPrintContext* ctxt, int prec,
pgf_print_literal(lit->lit, out, err);
break;
}
case PGF_EXPR_META:
case PGF_EXPR_META: {
PgfExprMeta* meta = ei.data;
gu_putc('?', out, err);
if (meta->id > 0)
gu_printf(out, err, "%d", meta->id);
break;
}
case PGF_EXPR_FUN: {
PgfExprFun* fun = ei.data;
pgf_print_cid(fun->fun, out, err);